Separation of methylene chloride from n-pentane by extractive distillation
US5304700A · kind A · utility
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Key dates
| Filing date | Jul 22, 1993 |
| Grant date | Apr 19, 1994 |
| Priority date | — |
| Expiry date | Jul 22, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Methylene chloride cannot be completely separated from n-pentane by conventional distillation or rectification because of the minimum boiling azeotrope. Methylene chloride can be readily separated from n-pentane by extractive distillation. Typical effective agents are 2-pentanone, isopropyl acetate or methanol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.